Multiple Choice
Which of the following correctly lists functions of proteins?
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4. Biomolecules
Proteins
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In protein synthesis, what purpose does the peptide bond serve?
A
It initiates the transcription process in the nucleus.
B
It links amino acids together to form a polypeptide chain.
C
It transports amino acids to the ribosome.
D
It facilitates the attachment of tRNA to mRNA.
Verified step by step guidance1
Understand the role of peptide bonds in protein synthesis: Peptide bonds are crucial for linking amino acids together, forming a polypeptide chain, which eventually folds into a functional protein.
Recognize the process of protein synthesis: It involves transcription and translation. Transcription occurs in the nucleus where mRNA is synthesized, and translation occurs in the cytoplasm where ribosomes facilitate the assembly of amino acids into proteins.
Identify the formation of peptide bonds: During translation, the ribosome catalyzes the formation of peptide bonds between adjacent amino acids, brought by tRNA, to elongate the polypeptide chain.
Clarify the misconception: Peptide bonds do not initiate transcription, transport amino acids, or facilitate tRNA attachment to mRNA. Their primary function is to link amino acids during protein synthesis.
Visualize the process: Picture the ribosome as a factory where tRNA brings amino acids, and peptide bonds are formed between them, creating a growing polypeptide chain that will become a protein.
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